The beat goes on. “Bucky Larson: Born to Be a Star” opens Friday without being screened for critics, the fifth such movie to go that route the past four weeks. The highest Tomatometer score of the first four? 33, for “Colombiana,” Zoe Saldana’s action flick. Just a guess — “Bucky” will be lucky to get half that.

What is it? Comedian Nick Swardson (“30 Minutes or Less”) gets his first starring role as the title character, a bucktoothed, simpleton bag boy with a bad haircut (he looks like the kid brother of Randy Quaid’s Amish goofball in “Kingpin”) who learns that his parents were old-school porn stars. Of course, he’s off to Hollywood to follow in Mom’s and Dad’s, uh, footsteps despite being spectacularly unqualified to be the next Ron Jeremy.

Why it’s not being screened Probably because everyone hated the trailer when it debuted in June. Understandable; it’s just not funny. And if the trailer isn’t funny, what’s the movie going to be like?